Diagnosis and Treatment of the Sacroiliac (SI) Joint | SI-BONE

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Diagnostic Resources

Symptoms and the SI joint exam.

About iFuse

Our minimally invasive option.

Clinical Results

Published, peer reviewed results.

Lower back pain and the sacroiliac (SI) joint

The SI joint has long been recognized as a source of lower back pain and several reports of surgical treatment date back to the 1920s.1, 2, 3 Numerous publications have studied the prevalence of SI joint pain as a component of lower back pain as well as in patients with prior lumbar fusion.

The iFuse Implant System is intended for sacroiliac fusion for conditions including sacroiliac joint dysfunction that is a direct result of sacroiliac joint disruption and degenerative sacroiliitis. This includes conditions whose symptoms began during pregnancy or in the peripartum period and have persisted postpartum for more than 6 months. There are potential risks associated with the iFuse Implant System. It may not be appropriate for all patients and all patients may not benefit. For information about the risks, visit: www.si-bone.com/risks

With more than 30,000 procedures performed and published studies demonstrating safety and clinical results, iFuse is the method of choice for SI joint fusion. 5, 6, 7


  1. Cohen, Steven P. Sacroiliac Joint Pain: A Comprehensive Review of Anatomy, Diagnosis, and Treatment. Anesth Analg 2005; 101:1440-1453.
  2. Goldthwait, Joel E, and Robert B Osgood. “A Consideration of the Pelvic Articulations from an Anatomical, Pathological and Clinical Standpoint.” Boston Medical and Surgical Journal 152, no. 21 (1905): 593–601.
  3. Campbell, Willis C. “An Operation for Extra-articular Fusion of the Sacro-iliac Joint.” Surgery, Gynecology and Obstetrics 45 (1927): 218–219.
  4. Smith-Petersen MN, Rogers WA. End result study of arthrodesis of the sacroiliac joint for arthritis – traumatic and non-traumatic. Journal of Bone and Joint Surgery 1926; 8:118-136.1.
  5. Miller, et al. “Analysis of postmarket complaints database for the iFuse SI Joint Fusion System®: a minimally invasive treatment for degenerative sacroiliitis and sacroiliac joint disruption.” Medical Devices: Evidence and Research 6 (2013).
  6. Rudolf, Leonard*. “Sacroiliac Joint Arthrodesis-MIS Technique with Titanium Implants: Report of the First 50 Patients and Outcomes.” The Open Orthopaedics Journal 6, no. 1 (November 30, 2012): 495–502. * Paid consultant, ownership interest, recipient of an SI-BONE research grant, and conducts clinical research for SI-BONE Inc.
  7. Polly, D.W. et al., Two-Year Outcomes from a Randomized Controlled Trial of Minimally Invasive Sacroiliac Joint Fusion vs. Non-Surgical Management for Sacroiliac Joint Dysfunction.Int J Spine Surg. 2016; 10:Article 28.— Dr. Polly is an investigator on a clinical research study sponsored by SI-BONE. He has no financial interest in SI-BONE. Research was funded by SI-BONE, Inc. A list of additional published studies is available at www.si-bone.com/results